Packet Capture 归档 - 夜莺博客

标签：Packet Capture

Cisco Nexus 9000 ERSPAN Configuration and Limitations

Cisco Nexus 9000 ERSPAN Configuration and Limitations

Configure ERSPAN on Cisco Nexus 9000: source and destination sessions, GRE encapsulation, ACL filters, MTU behaviour and platform-specific limitations

admin admin 2026-09-21
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SPAN, RSPAN and ERSPAN: Choosing a Mirror Transport

SPAN, RSPAN and ERSPAN: Choosing a Mirror Transport

Compare Cisco mirror transports: local SPAN, RSPAN over Layer 2 and ERSPAN over GRE, with their overhead, MTU traps and the checks that fix empty capt

admin admin 2026-09-13
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Wireshark TCP: Retransmission vs Out-of-Order vs Loss

Wireshark TCP: Retransmission vs Out-of-Order vs Loss

Wireshark TCP retransmission flags are interpretations, not facts. Use sequence ranges, SACK blocks and capture points to separate real loss from reor

admin admin 2026-09-12
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Cisco IOS-XE Embedded Packet Capture: EPC Runbook

Cisco IOS-XE Embedded Packet Capture: EPC Runbook

Use IOS-XE Embedded Packet Capture on the device itself: pick EPC vs SPAN, size the buffer, filter, run, inspect and export the PCAP, then debug the c

admin admin 2026-09-11
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